Battery and electric device

Abstract

A battery (10) and an electric device (1). The battery (10) comprises a battery unit (100), a limiting structure (110) and a heating assembly (130), wherein the battery unit (100) comprises a plurality of battery cells (120) arranged in sequence, the limiting structure (110) limits and fixes the plurality of battery cells (120), and the limiting structure (110) is used for connecting to an insulation detection module. The heating assembly (130) comprises a conductive structure (131) and a heating film (132), wherein the heating film (132) is stacked on one side of the conductive structure (131), the conductive structure (131) is electrically connected to the limiting structure (110), and the conductive structure (131) or the heating film (132) is arranged in contact with the battery unit (100). In the battery (10), whether the heating film (132) is punctured can be detected by means of the insulation detection module, thereby in a timely manner discovering and treating the situation in which the heating film (132) is punctured, and improving the use stability of the battery (10).

Description

Batteries and electrical devices

[0001] This application claims priority to Chinese patent application filed on June 20, 2024, with application number 202421421857.6 and entitled "Battery and Power-consuming Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and more specifically, to a battery and an electrical device. Background Technology

[0003] As environmental pollution becomes increasingly serious, people's environmental awareness is gradually increasing. At the same time, the rapid rise of the new energy industry has provided a broad space for the application and development of batteries.

[0004] In low ambient temperatures, heating is necessary to ensure battery stability. Related technologies typically use heating films to heat the battery. However, these heating films can be punctured. When punctured, the temperature in the punctured area rises, potentially burning structures near the film and affecting battery stability.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application aims to provide a battery and an electrical device to solve the technical problem that the heating film being punctured affects the stability of battery use in the prior art.

[0007] In a first aspect, a battery is provided, comprising:

[0008] A battery cell, comprising multiple battery cells arranged in sequence;

[0009] The limiting structure limits and fixes multiple battery cells, and is used to connect the insulation detection module.

[0010] Heating components, including:

[0011] The conductive structure is electrically connected to the limiting structure.

[0012] A heating film is stacked on one side of the conductive structure;

[0013] The conductive structure or heating film is positioned in contact with the battery cell.

[0014] In the battery provided in this embodiment, a heating component is used to heat the battery cells. A heating film is stacked on one side of the conductive structure, and the conductive structure provides protection for the heating film from at least one side. If the heating film is punctured, it will leak current to the conductive structure. The conductive structure is electrically connected to the limiting structure, so an insulation detection module connected to the limiting structure can detect any abnormalities in the insulation performance of the limiting structure. This facilitates timely detection of leakage in the heating film, allowing for prompt handling of the leakage and improving the battery's operational stability.

[0015] In one possible design, the battery also includes a battery management device, which includes an insulation detection module.

[0016] In this configuration, the insulation performance of the limiting structure is detected by the insulation detection module in the battery management device inside the battery, eliminating the need to connect any other external insulation detection modules.

[0017] In one possible design, the limiting structure includes two end plates spaced apart along a first direction, which are respectively fixed to the battery cell on both sides of the first direction. At least one of the end plates is used to connect an insulation detection module and is electrically connected to a conductive structure.

[0018] In this configuration, the conductive structure is electrically connected to the end plate, which is located on the outside of the battery cell in the first direction. This provides a large operating space and facilitates the electrical connection between the conductive structure and the end plate.

[0019] In one possible design, the battery also includes fasteners, through which the conductive structure is electrically connected to the two end plates respectively.

[0020] In this configuration, both ends of the conductive structure are electrically connected to the end plate, which increases the electrical connection area between the conductive structure and the limiting structure, improves the stability of the electrical connection, and the connection between the conductive structure and the end plate is made simple, easy to operate, and highly efficient.

[0021] In one possible design, the conductive structure is in contact with the battery cell, and the heating film is attached to the side of the conductive structure away from the battery cell.

[0022] In this configuration, the conductive structure separates the heating film from the battery cell, thereby reducing the risk of scratches between the heating film and the battery cell and further protecting the battery cell.

[0023] In one possible design, the heating assembly also includes an insulating layer disposed on the side surface of the conductive structure facing the battery cell.

[0024] In this configuration, the insulating layer improves the insulation performance between the conductive structure and the battery cell, thus enhancing the protection of the battery cell.

[0025] In one possible design, an adhesive layer is provided on the side of the conductive structure facing the battery cell, and the conductive structure is connected to the battery cell through the adhesive layer.

[0026] In this configuration, the conductive structure is connected to the battery cell through an adhesive layer, resulting in high connection stability, a large contact area, which is beneficial for heat conduction, and the conductive structure provides better positioning and fixing effect for the battery cell.

[0027] In one possible design, a baffle structure is also provided on the side of the conductive structure facing the battery cell, and the baffle structure is provided around the adhesive layer on the surface of the conductive structure.

[0028] In this configuration, due to the adhesive barrier structure, a relatively thicker adhesive layer can be applied to one side of the conductive structure to improve the connection stability between the conductive structure and the battery cell.

[0029] In one possible design, the adhesive barrier structure is a flexible structure.

[0030] In this configuration, the adhesive barrier structure also acts as a spacer and buffer between the battery cell and the conductive structure.

[0031] In one possible design, the adhesive-blocking structure is located on the outside of the conductive structure.

[0032] In this configuration, the adhesive barrier is positioned between the edge of the conductive structure and the battery cell, thus providing better protection for the battery cell.

[0033] In one possible design, the conductive structure is an aluminum plate or aluminum foil.

[0034] In this configuration, the aluminum plate and aluminum foil have good electrical conductivity and are relatively lightweight.

[0035] Secondly, an electrical device is provided, which includes the battery provided by the above-mentioned technical solution, and the battery is used to provide electrical energy.

[0036] Since the electrical device includes the aforementioned battery, it possesses at least all the beneficial effects of the aforementioned battery, which will not be elaborated upon here.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, a brief description of the specific embodiments will be provided below. In all the accompanying drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are merely some embodiments of this application; those skilled in the art can obtain other drawings based on the drawings without any creative effort.

[0039] Figure 1 is a schematic diagram of the structure of an electrical device provided in an embodiment of this application;

[0040] Figure 2 is a schematic diagram of an explosion of a battery provided in an embodiment of this application;

[0041] Figure 3 is a schematic diagram showing the relative positions of the battery cell, the limiting structure, and the heating component provided in an embodiment of this application;

[0042] Figure 4 is a schematic diagram of the structure of a heating assembly provided in an embodiment of this application;

[0043] Figure 5 is a cross-sectional view of the battery in Figure 4 along line AA.

[0044] Figure 6 is a structural schematic diagram of a heating assembly provided in one embodiment of this application from another perspective;

[0045] Figure 7 is a schematic diagram of the adhesive barrier structure and the position of the adhesive layer on the conductive structure provided in an embodiment of this application;

[0046] Figure 8 is an exploded view of a heating assembly provided in an embodiment of this application.

[0047] The details of the reference numerals used in the above figures are as follows:

[0048] 1-Electrical device; 10-Battery; 20-Control mechanism; 30-Drive mechanism; 100-Battery cell; 200-Box; 300-Cover; 110-Limiting structure; 111-End plate; 112-Metal strip; 113-Elastic strap; 120-Battery cell; 130-Heating assembly; 131-Conductive structure; 1311-Through hole; 1312-Insulating layer; 1313-Adhesive layer; 1314-Adhesive-blocking structure; 132-Heating film; 1321-Heating element; 1322-Insulator; 1323-Wire; 1324-Connecting terminal; 133-Fastener. Detailed Implementation

[0049] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0050] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two).

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0052] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] As environmental pollution worsens and people's environmental awareness increases, the rapid rise of the new energy industry has provided ample opportunities for the application and development of rechargeable batteries. These batteries are widely used in electric vehicles, aerospace, and many other fields.

[0055] In related technologies, a battery includes battery cells with a heating film on the outside of each cell. The heating film is adhered to the outside of the battery cell and in contact with it to heat the cell. The heating film includes metal wires covered with an insulating layer. The battery also includes a casing, with the battery cells installed inside. The heating film is located on the outside of the battery cells, so the battery cells and the casing are on either side of the heating film. During battery manufacturing, particulate matter, such as metal particles, is easily generated. These particles may be located on the inner wall of the casing or the outer wall of the battery cells. When the heating film comes into contact with these particles, the insulating layer is easily punctured, exposing the metal wires and potentially causing some wires to break. Firstly, the resistance at the punctured area increases, leading to a temperature rise. Secondly, the puncture affects the overall resistance distribution and heat transfer efficiency of the heating film, preventing effective heat dissipation in the punctured area and causing further temperature increases. This localized temperature increase in the heating film can cause abnormal temperature increases in nearby structures. If non-metallic structures exist near the heating film, these structures are prone to ablation, affecting the battery's operational stability.

[0056] Based on the above considerations, this application provides a battery comprising a limiting structure, a battery cell, a conductive structure, and a heating film. The heating film is used to heat the battery cell. The conductive structure is electrically connected to the limiting structure, which is used to limit and fix the battery cell. The heating film is stacked on the conductive structure. The limiting structure is connected to an insulation detection module, which is used to detect the insulation performance of the limiting structure. In this type of battery, if the heating film is punctured, the heating film leaks current to the conductive structure, and then conducts it to the limiting structure. The insulation detection module can detect the leakage of the heating film by detecting the insulation performance of the limiting structure, thus enabling the puncture of the heating film to be detected relatively quickly, facilitating timely handling of the puncture problem and improving the stability of the battery.

[0057] The battery and power-consuming device provided in the embodiments of this application will be explained in detail below.

[0058] The battery disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements.

[0059] Please refer to Figure 1. For ease of description, this example uses a vehicle as the electrical device 1. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle's interior can house a drive mechanism 30, a control mechanism 20, and a battery 10. The drive mechanism 30 can be a motor, etc., and the control mechanism 20 controls the battery 10 to supply power to the drive mechanism 30. For example, the battery 10 can be located at the bottom, front, or rear of the vehicle. The battery 10 can be used to power other equipment in the vehicle. For example, the battery 10 can serve as the vehicle's operating power source for the vehicle's electrical system, such as for the power requirements of starting, navigation, and operation. In another example, the battery 10 can not only serve as the vehicle's operating power source but also as the vehicle's driving power source, replacing or partially replacing gasoline or natural gas to provide driving force for the vehicle. The vehicle in this example uses the aforementioned battery 10. By improving the reliability of the battery 10, the reliability of the electrical device 1 can be improved.

[0060] As shown in Figures 2 to 5, the battery 10 provided in this embodiment includes a limiting structure 110, a battery unit 100, and a heating assembly 130. The battery unit 100 includes a plurality of battery cells 120 arranged in sequence. The limiting structure 110 limits and fixes the plurality of battery cells 120 and is used to connect an insulation detection module. The heating assembly 130 is in contact with the battery unit 100. The heating assembly 130 includes a conductive structure 131 and a heating film 132. The conductive structure 131 is electrically connected to the limiting structure 110. The heating film 132 is stacked on one side of the conductive structure 131. The conductive structure 131 or the heating film 132 is in contact with the battery cells 120.

[0061] In this embodiment, the battery unit 100 includes multiple battery cells 120, which can be electrically connected in series, parallel, or mixed configurations. A limiting structure 110 is used to limit and fix the multiple battery cells 120 in the battery unit 100, so that the multiple battery cells 120 are relatively fixed as a single structure, facilitating synchronous movement of the multiple battery cells 120. Since the limiting structure 110 is used to limit and fix the battery unit 100, it is fixedly disposed relative to the battery unit 100. The limiting structure 110 can limit and fix the battery unit 100 through methods such as bonding, clamping, or interference fit assembly. The limiting structure 110 is connected to an insulation detection module, which can be a module inherent to the battery 10 itself or an external module. For example, the battery 10 includes an insulation detection module, and the limiting structure 110 is connected to this insulation detection module. In another example, the battery 10 is applied to an electrical device 1, which includes an insulation detection module, and the limiting structure 110 is connected to the insulation detection module. The insulation detection module is used to detect the insulation performance of the limiting structure 110. For example, the insulation detection module can determine whether the insulation performance of the limiting structure 110 is abnormal by detecting whether the voltage of the limiting structure 110 is within the voltage range of the limiting structure 110 under normal insulation conditions, or whether the current of the limiting structure 110 is within the current range of the limiting structure 110 under normal insulation conditions, or whether the insulation resistance of the limiting structure 110 is within the insulation resistance range of the limiting structure 110 under normal insulation conditions.

[0062] The battery cell 120 can be a rechargeable battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 120 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this.

[0063] The battery cell 120 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include square battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0064] In one example, as shown in FIG3, the battery cell 100 contains multiple battery cells 120 arranged along a first direction. A heating assembly 130 is located on one side of the multiple battery cells 120 along a second direction, perpendicular to the first direction, so that the conductive structure 131 or heating film 132 in the heating assembly 130 can contact the multiple battery cells 120 respectively. Exemplarily, a battery cell 120 may include an end face defined by a length edge and a width edge, a small face defined by a width edge and a height edge, and a large face defined by a length edge and a height edge. The heating assembly 130 may be disposed outside the large face, outside the small face, or outside the end face of the battery cell 120. In FIG3, the width direction of the battery cell 120 is the first direction, the length direction of the battery cell 120 is the second direction, the large faces of adjacent battery cells 120 face each other, and the small faces of each battery cell 120 contact the conductive structure 131 or heating film 132 in the heating assembly 130.

[0065] As shown in Figure 3, in this embodiment, the length direction of the battery cell 120 is the Y-axis direction, the width direction of the battery cell 120 is the X-axis direction, and the height direction of the battery cell 120 is the Z-axis direction.

[0066] The heating assembly 130 includes a conductive structure 131 and a heating film 132. The conductive structure 131 is electrically connected to the limiting structure 110, thereby placing the conductive structure 131 and the limiting structure 110 at the same potential, i.e., the conductive structure 131 and the limiting structure 110 are equipotentially connected. The heating film 132 is used to heat the battery cell 120. The heating film 132 can be disposed on the side of the conductive structure 131 facing the battery cell 120, in which case the heating film 132 is in contact with the battery cell 120, and the heating film 132 can directly heat the battery cell 120. Alternatively, the heating film 132 can be disposed on the side of the conductive structure 131 away from the battery cell 120, and the heat of the heating film 132 is transferred to the battery cell 120 through the conductive structure 131, i.e., the heating film 132 heats the battery cell 120 through the conductive structure 131. The heating film 132 can be fixedly connected to the conductive structure 131; for example, the heating film 132 is bonded to the conductive structure 131.

[0067] The heating film 132 can be an electrically heated structure. Exemplarily, as shown in FIG5, the heating film 132 includes a heating element 1321 and an insulator 1322, with the insulator 1322 covering the outside of the heating element 1321. The heating element 1321 may include a heating wire, such as a metal wire, which heats up when energized, thereby heating the battery cell 120. In one example, the heating element 1321 includes a heating layer composed of heating wires, with insulators 1322 respectively disposed on both sides of the heating layer, the insulators 1322 covering the heating layer in the middle, thus insulating the heating element 1321. If the heating film 132 is punctured, the heating element 1321 of the heating film 132 comes into contact with the conductive structure 131. The current in the heating element 1321 flows to the conductive structure 131 and then through the conductive structure 131 to the limiting structure 110, enabling the insulation detection module to detect an abnormality in the insulation performance of the limiting structure 110. As shown in Figures 3 and 4, the heating film 132 may further include a wire 1323 and a connecting terminal 1324. The wire 1323 is electrically connected to the heating element 1321 and extends to the outside of the insulator 1322. One end of the wire 1323 located outside the insulator 1322 is electrically connected to the connecting terminal 1324. The connecting terminal 1324 is used to connect to a power supply component to supply power to the heating element 1321. Exemplarily, the heating element 1321 is connected to two wires 1323, each connected to a connecting terminal 1324, where one connecting terminal 1324 is the positive terminal and the other is the negative terminal.

[0068] As shown in Figure 2, the battery 10 may include multiple battery cells 100, multiple limiting structures 110, and multiple heating components 130. Each battery cell 100 is correspondingly arranged with one of the multiple limiting structures 110. Each limiting structure 110 is used to limit and fix multiple battery cells 120 within the corresponding battery cell 100. At least one heating component 130 is provided for each battery cell 100. Therefore, the battery 10 may include multiple heating components 130. For example, each heating component 130 may be connected to a power supply component, or the heating components 130 may be connected in series before being connected to the power supply component. When the heating components 130 are connected in series before being connected to the power supply component, they can be connected in series via the positive and negative terminals of the heating film 132. For example, the positive terminal of the first heating film 132 can be electrically connected to the negative terminal of the second heating film 132, and the positive terminal of the second heating film 132 can be electrically connected to the negative terminal of the third heating film 132, thus connecting the three heating films 132 in series, which is equivalent to connecting the three heating components 130 in series. The negative terminal of the first heating film 132 can be electrically connected to the negative terminal of the power supply component, and the positive terminal of the third heating film 132 can be electrically connected to the positive terminal of the power supply component, thus connecting the three heating components 130 in series to the power supply component. The power supply component can be an external structure of the battery 10, or it can be the main circuit of the battery 10. The main circuit includes a main positive terminal and a main negative terminal. The positive terminal of the heating film 132 is electrically connected to the main positive terminal, and the negative terminal of the heating film 132 is electrically connected to the main negative terminal.

[0069] In the battery 10 provided in this embodiment, the heating component 130 is used to heat the battery cell 120. The heating film 132 is disposed on one side of the conductive structure 131, and the conductive structure 131 provides protection for the heating film 132 from at least one side. If the heating film 132 is punctured, the heating element 1321 of the heating film 132 is exposed and comes into contact with the conductive structure 131. The current of the heating element 1321 flows to the conductive structure 131. The conductive structure 131 is electrically connected to the limiting structure 110. Therefore, the insulation performance of the limiting structure 110 can be detected by the insulation detection module connected to the limiting structure 110, thereby facilitating timely detection of leakage in the heating film 132 and timely handling of the leakage, thus improving the stability of the battery 10.

[0070] In one possible design, battery 10 also includes a battery management device, which includes an insulation detection module.

[0071] The Battery Management System (BMS) is used to monitor and manage the status and performance of the battery 10. For example, the BMS can manage the charge and discharge status of each battery cell 120, and can detect the voltage, current, etc., of each battery cell 120. The BMS includes an insulation detection module connected to a limiting mechanism. In this configuration, the insulation performance of the limiting structure 110 is detected by the insulation detection module within the BMS of the battery 10, thus eliminating the need to connect other external insulation detection modules.

[0072] In one example, the battery management device further includes a control module and an alarm module. Both the alarm module and the insulation detection module are connected to the control module. When the insulation detection module detects an abnormality in the insulation performance of the limiting structure 110, the control module controls the alarm module to issue an alarm. Exemplarily, the alarm module may include a buzzer, a display screen, or a warning light, etc., for issuing an alarm. The buzzer can sound an alarm, the display screen can display text or images indicating warning information, and the warning light can illuminate or flash to issue an alarm. In other examples, the battery management device further includes a control module connected to both the heating film 132 and the insulation detection module. When the insulation detection module detects an abnormality in the insulation performance of the limiting structure 110, the control module controls the heating film 132 to stop heating.

[0073] As shown in Figure 3, in one possible design, the limiting structure 110 includes two end plates 111 spaced apart along a first direction. The two end plates 111 are respectively limited and fixed on both sides of the battery cell 100 in the first direction. At least one of the two end plates 111 is used to connect an insulation detection module and is electrically connected to the conductive structure 131.

[0074] Two end plates 111 respectively limit the battery cell 120 at both ends in the first direction. At least one of the two end plates 111 is used to connect to the insulation detection module and is electrically connected to the conductive structure 131. That is, of the two end plates 111, only one end plate 111 can be electrically connected to the insulation detection module, and the end plate 111 electrically connected to the insulation detection module is also electrically connected to the conductive structure 131. Alternatively, both end plates 111 are electrically connected to the insulation detection module and both end plates 111 are electrically connected to the conductive structure 131.

[0075] The battery 10 provided in this embodiment can be a module-less battery (Cell To Pack, CTP). In the module-less battery, the battery 10 includes a housing 200, within which multiple battery cells 100 are disposed. A limiting structure 110 is provided for each battery cell 100. The limiting structure 110 is used to limit and fix the multiple battery cells 120 within the corresponding battery cell 100 into a single integrated structure. For example, the limiting structure 110 includes two end plates 111, without a bottom or top plate between the two end plates 111. The two end plates 111 and the multiple battery cells 120 are fixedly connected by a binding structure. The battery 10 may also include a cover 300, which covers the housing 200, and the cover 300 and the housing 200 together form a space for accommodating the battery cells 100. For example, as shown in FIG3, two end plates 111 are respectively located on both sides of a plurality of battery cells 120 in a first direction, and the two end plates 111 and the plurality of battery cells 120 are fixedly connected by two binding structures. The binding structures are arranged around the periphery of the two end plates 111 and the plurality of battery cells 120, and the two binding structures are spaced apart in the height direction of the battery 10. The binding structure can be a metal strip 112 or an elastic binding strap 113. For example, one binding structure is a metal strip 112, such as a steel strip, and the other binding structure is an elastic binding strap 113.

[0076] As another embodiment of the battery 10, the battery 10 may not include a casing. Instead, multiple battery cells 120 in the battery unit 100 are fixed and positioned by a limiting structure 110 and then assembled into the electrical device.

[0077] In this configuration, the end plate 111 is electrically connected to the conductive structure 131. Since the end plate 111 is located on the outside of the battery cell 100 in the first direction, the operating space in the area where the end plate 111 is located is relatively larger, which facilitates the electrical connection operation between the end plate 111 and the conductive structure 131.

[0078] In some embodiments, the connection between the conductive structure 131 and the end plate 111 can be achieved by fasteners or welding, thereby making the conductive structure 131 and the end plate 111 fixedly connected and electrically connected, thus improving the connection stability between the conductive structure 131 and the end plate 111.

[0079] In some embodiments, as shown in FIG3, the battery 10 further includes a fastener 133, and the conductive structure 131 is electrically connected to the two end plates 111 through the fastener 133.

[0080] Fastener 133 can be a conductive structure such as a rivet or bolt.

[0081] The conductive structure 131 is electrically connected to both end plates, and both end plates 111 are connected to the insulation detection module. For example, each of the two end plates 111 can be connected to the insulation detection module, or the two end plates 111 can be electrically connected, with one end plate 111 connected to the insulation detection module, so that any abnormal insulation performance of either end plate 111 can be detected by the insulation detection module.

[0082] In this configuration, since the conductive structure 131 is electrically connected to the two end plates 111, the electrical connection area between the conductive structure 131 and the limiting structure 110 is relatively large. This allows the current in the heating film 132 to be transmitted to the end plate 111 through the electrical connection area between the conductive structure 131 and the limiting structure 110 when the heating film 132 is punctured, so that the insulation performance can be tested by the insulation detection module electrically connected to the end plate 111.

[0083] In one possible design, the conductive structure 131 has through holes 1311 at both ends in the first direction (as shown in Figures 4 and 6), and the battery 10 also includes fasteners 133 (as shown in Figure 3). The fasteners 133 pass through the through holes 1311, and the conductive structure 131 is electrically connected to the two end plates 111 through the fasteners 133.

[0084] In this configuration, the connection between the conductive structure 131 and the end plate 111 is simple, easy to operate, and has high connection efficiency.

[0085] As shown in Figure 3, the length direction of the conductive structure 131 is the X-axis direction, the width direction is the Z-axis direction, and the thickness direction is the Y-axis direction. As shown in Figure 4, the through hole 1311 penetrates the conductive structure 131 along its thickness direction. Multiple through holes 1311 can be provided at both ends of the conductive structure 131 along its length. The number of through holes 1311 can be determined based on factors such as the weight and width of the conductive structure 131. If the conductive structure 131 is heavy and / or wide, more through holes 1311 can be provided to allow for the use of more rivets to secure the conductive structure 131 and the end plate 111.

[0086] In one possible design, as shown in Figure 3, the conductive structure 131 is in contact with the battery cell 120, and the heating film 132 is attached to the side of the conductive structure 131 away from the battery cell 120.

[0087] The heating film 132 can be attached to the conductive structure 131 using double-sided adhesive, or adhesive can be applied to the side of the heating film 132 facing the conductive structure 131 to attach the heating film 132 to the conductive structure 131. The heating film 132 is located on the side of the conductive structure 131 away from the battery cell 120, and the heat generated by the heating film 132 is transferred to the battery cell 120 through the conductive structure 131 to heat the battery cell 120.

[0088] In this configuration, the conductive structure 131 separates the heating film 132 from the battery cell 120, thereby reducing the risk of scratches between the heating film 132 and the battery cell 120 and further protecting the battery cell 120.

[0089] In one possible design, as shown in Figure 5, the heating assembly 130 further includes an insulating layer 1312 disposed on the side surface of the conductive structure 131 facing the battery cell 120.

[0090] In some embodiments, the insulating layer 1312 can be formed by spraying insulating varnish. The insulating varnish is sprayed onto the surface of the conductive structure 131 facing the battery cell 120, in the area opposite to the battery cell 120, to form the insulating layer 1312. The connection between the insulating layer 1312 formed by spraying insulating varnish and the conductive structure 131 is highly stable. In other embodiments, the insulating layer 1312 can be a layered structure made of insulating material, and the insulating layer 1312 is fixed to the area of ​​the conductive structure 131 facing the battery cell 120. The insulating layer 1312 and the conductive structure 131 can be bonded together.

[0091] In the first direction, the length of the insulating layer 1312 is less than the length of the conductive structure 131. On the side of the conductive structure 131 facing the battery cell 120, the insulating layer 1312 covers a portion of that side, and the area not covered by the insulating layer 1312 is used for electrical connection with the limiting structure 110.

[0092] In this configuration, the insulating layer 1312 improves the insulation performance between the conductive structure 131 and the battery cell 120, thereby enhancing the protection performance of the battery cell 120.

[0093] In one possible design, as shown in Figures 5 and 7, an adhesive layer 1313 is provided on the side of the conductive structure 131 facing the battery cell 120, and the conductive structure 131 is connected to the battery cell 120 through the adhesive layer 1313.

[0094] Since the conductive structure 131 is connected to the limiting structure 110, and the limiting structure 110 acts as a limiting element for the battery cell 120, connecting the conductive structure 131 to the battery cell 120, and indirectly connecting the battery cell 120 to the limiting structure 110 through the conductive structure 131, improves the connection stability between the battery cell 120 and the limiting structure 110. The connection between the conductive structure 131 and the battery cell 120 ensures stable contact even during shaking, facilitating heat conduction between them. This allows the heat generated by the heating film 132 to be transferred to the battery cell 120 via the conductive structure 131. The adhesive layer 1313 can be a double-sided adhesive, such as double-sided adhesive paper or double-sided adhesive tape, or it can be formed by applying an adhesive liquid to the conductive structure 131. The conductive structure 131 is connected to the battery cell 120 through an adhesive layer 1313. The connection operation is simple, convenient and low cost. In addition, the connection through the adhesive layer 1313 makes the connection area between the conductive structure 131 and the battery cell 120 relatively large and the connection stability relatively strong.

[0095] In one possible design, as shown in Figures 5 to 8, the conductive structure 131 is further provided with an adhesive barrier structure 1314 on the side facing the battery cell 120, and the adhesive barrier structure 1314 is provided around the adhesive layer 1313 on the surface of the conductive structure 131.

[0096] As shown in Figures 7 and 8, the adhesive-blocking structure 1314 surrounds the periphery of the adhesive layer 1313. During the connection process between the heating component 130 and the battery cell 120, the adhesive-blocking structure 1314 can be first placed on the conductive structure, forming a closed ring. The area enclosed by the adhesive-blocking structure 1314 forms the adhesive coating area, where adhesive is applied to form the adhesive layer 1313. Due to the presence of the adhesive-blocking structure 1314, a groove-like area is formed between the adhesive-blocking structure 1314 and the conductive structure 131 to accommodate more adhesive and facilitate control of the shape and size of the coating area. By controlling the thickness of the adhesive-blocking structure 1314, the thickness of the adhesive layer 1313 can be controlled to a certain extent, thus forming an adhesive layer 1313 of a set thickness. For example, when the size of the conductive structure 131 is relatively large, the connection strength between the conductive structure 131 and the battery cell 120 can be improved by providing a relatively thicker adhesive layer 1313, thereby enhancing the connection stability between the conductive structure 131 and the battery cell 120.

[0097] In one possible design, the adhesive barrier structure 1314 is a flexible structure. The adhesive barrier structure 1314 is made of a flexible material, such as foam, rubber, or silicone. Because the adhesive barrier structure 1314 is made of a flexible material, which possesses a certain degree of elastic deformation capability, it can provide a buffering effect between the conductive structure 131 and the battery cell 120.

[0098] In one possible design, as shown in Figures 6 and 7, a portion of the adhesive barrier structure 1314 is located outside the conductive structure 131.

[0099] In one example, the conductive structure 131 is connected to the end plate 111 at its length end, and its width edge is distributed opposite to the battery cell 120. A portion of the adhesive-blocking structure 1314 is located outside the conductive structure in the width direction, covering the width edge of the conductive structure 131. Since the adhesive-blocking structure 1314 is located between the conductive structure 131 and the battery cell 120, it acts as a buffer and isolation between the width edge of the conductive structure 131 and the battery cell 120, preventing direct contact between the width edge of the conductive structure 131 and the battery cell 120 to a certain extent, thus protecting the battery cell 120.

[0100] In some embodiments, the conductive structure 131 is an aluminum plate or aluminum foil.

[0101] The aluminum plate is a sheet material containing metallic aluminum. It has good electrical conductivity and is relatively lightweight. The aluminum plate also has relatively high structural strength and is relatively light. Because of its lighter weight, it provides stronger protection for the heating film 132 and the battery cell 120. Since the aluminum plate is connected to two end plates 111 at both ends in the first direction and is located on one side of the battery cell 120 in the second direction, it serves both to limit the movement of the battery cell 120 in the second direction and to provide some protection there.

[0102] Compared to aluminum plates, aluminum foil is typically thinner; for example, the thickness of aluminum foil is equal to or less than 0.2 mm. Aluminum foil is relatively lightweight, thus making the battery 10 relatively lightweight. The aluminum foil can be bonded to the battery cell 120 via an adhesive layer 1313 to improve the connection stability between the aluminum foil and the battery cell 120. The adhesive layer 1313 can be double-sided adhesive paper, or it can be formed by coating an adhesive onto the area where the aluminum foil and battery cell 120 face each other. An insulating layer 1312 can be provided on the area where the aluminum foil and battery cell 120 face each other. The insulating layer 1312 can be a layered structure made of insulating material, and it can be adhered to the side of the aluminum foil facing the battery cell 120. When an insulating layer 1312 is provided on the aluminum foil, the adhesive layer 1313 is located on the side of the insulating layer 1312 facing the battery cell 120. That is to say, the aluminum foil is bonded to the insulating layer 1312, and the insulating layer 1312 is bonded to the battery cell 120 through the adhesive layer 1313, thereby fixing the aluminum foil and the battery cell 120 together.

[0103] In one specific embodiment of this application, the battery 10 includes a limiting structure 110, battery cells 120, and a heating assembly 130. The limiting structure 110 includes two end plates 111 spaced apart from each other in a first direction. There are multiple battery cells 120 arranged in a group along the first direction, with the two end plates 111 located on opposite sides of the group of battery cells 120 in the first direction. The heating assembly 130 includes a conductive structure 131 and a heating film 132. The conductive structure 131 is an aluminum plate. Two opposing sides of the aluminum plate defined by its length and width directions are referred to as the first side and the second side, respectively. The first side is the side of the aluminum plate facing the battery cell 120, and the second side is the side of the aluminum plate away from the battery cell 120. The aluminum plate sequentially includes a first region, a second region, and a third region along the first direction. The first and third regions are located on opposite sides of the second region, which is directly opposite the battery cell 120. The first and third regions are directly opposite the two end plates 111. Through holes 1311 are provided along the thickness direction of the aluminum plate in the first and third regions, respectively. The first region is connected to one end plate 111 by at least two rivets, and the third region is connected to another end plate 111 by at least two rivets. An insulating layer 1312 is provided on the first surface of the second region. The insulating layer 1312 can be formed by spraying insulating paint onto the aluminum plate. An annular adhesive-blocking structure 1314 is provided on the side of the insulating layer 1312 facing the battery cell 120. The adhesive-blocking structure 1314 is made of foam, and an adhesive layer 1313 is provided in the area enclosed by the adhesive-blocking structure 1314. The conductive structure 131 is bonded to the battery cell 120 through the adhesive. The adhesive-blocking structure 1314 extends beyond the edge of the conductive structure 131 in the width direction, thereby covering the edge of the conductive structure 131 and providing protection and cushioning for the edge of the conductive structure 131. The adhesive-blocking structure 1314 also acts as a spacer between the battery cell 120 and the edge of the conductive structure 131, providing protection and cushioning for the battery cell 120. The heating film 132 is adhered to the second side of the second region. The battery 10 also includes a battery management device, which includes an insulation detection module for detecting the insulation performance of the limiting structure 110. The battery management device may also include an alarm module for issuing an alarm when the insulation detection module detects an abnormality in the insulation performance of the limiting structure 110.

[0104] In another specific embodiment of this application, the battery 10 includes a limiting structure 110, battery cells 120, and a heating assembly 130. The limiting structure 110 includes two end plates 111 spaced apart from each other in a first direction. Multiple battery cells 120 are arranged in a group along the first direction, with the two end plates 111 located on opposite sides of the group of battery cells 120 in the first direction. The heating assembly 130 includes a conductive structure 131 and a heating film 132. The conductive structure is an aluminum foil, with both ends of the aluminum foil fixedly connected and electrically connected to the two end plates 111 in the first direction. The heating film 132 is adhered to the side of the aluminum foil facing away from the battery cells 120, and an adhesive layer 1313 is provided on the side of the aluminum foil facing the battery cells 120. The aluminum foil is connected to the battery cells 120 through the adhesive layer 1313. The battery 10 also includes a battery management device, which includes an insulation detection module for detecting the insulation performance of the limiting structure 110. The battery management device may also include an alarm module for issuing an alarm when the insulation detection module detects an abnormality in the insulation performance of the limit structure 110.

[0105] This application embodiment also provides an electrical device 1, which includes a battery 10 provided by the above technical solution, and the battery 10 is used to provide electrical energy.

[0106] The electrical device 1 provided in this application embodiment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, wherein, include: A battery cell, comprising a plurality of battery cells arranged in sequence; A limiting structure is provided to limit and fix multiple battery cells, and the limiting structure is used to connect to an insulation detection module. Heating components, including: A conductive structure is electrically connected to the limiting structure; A heating film is stacked on one side of the conductive structure; The conductive structure or the heating film is disposed in contact with the battery cell.

2. The battery as claimed in claim 1, wherein, The battery also includes a battery management device, which includes the insulation detection module.

3. The battery as described in claim 1 or 2, wherein, The limiting structure includes two end plates spaced apart along a first direction. The two end plates are respectively fixed to the battery cell on both sides of the first direction. At least one of the two end plates is used to connect to the insulation detection module and is electrically connected to the conductive structure.

4. The battery as claimed in claim 3, wherein, The battery also includes fasteners, and the conductive structure is electrically connected to the two end plates respectively through the fasteners.

5. The battery as claimed in claim 3 or 4, wherein, The battery also includes a binding structure, which is arranged around the periphery of the two end plates and the plurality of battery cells, and the two end plates and the plurality of battery cells are fixedly connected by the binding structure.

6. The battery as claimed in claim 5, wherein, The binding structure is a metal strap and / or an elastic strap.

7. The battery according to any one of claims 1 to 6, wherein, The conductive structure is in contact with the battery cell, and the heating film is attached to the side of the conductive structure away from the battery cell.

8. The battery as claimed in claim 7, wherein, The heating assembly further includes an insulating layer disposed on the side surface of the conductive structure facing the battery cell.

9. The battery as claimed in claim 7 or 8, wherein, The conductive structure has an adhesive layer on the side facing the battery cell, and the conductive structure is connected to the battery cell through the adhesive layer.

10. The battery as claimed in claim 9, wherein, The conductive structure is further provided with an adhesive-blocking structure on the side facing the battery cell, and the adhesive-blocking structure is disposed around the adhesive layer on the surface of the conductive structure.

11. The battery of claim 10, wherein, The adhesive-blocking structure is a flexible structure.

12. The battery as claimed in claim 10 or 11, wherein, The portion of the adhesive-blocking structure is located on the outside of the conductive structure.

13. The battery according to any one of claims 1 to 12, wherein, The conductive structure is an aluminum plate or aluminum foil.

14. The battery according to any one of claims 1 to 13, wherein, The heating film includes a heating element and an insulator, with the insulator covering the outside of the heating element.

15. An electrical appliance, wherein, Includes a battery as described in any one of claims 1 to 14, the battery being used to provide electrical energy.

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